linux-kernel - Re: [PATCH] mm/mprotect: Fix maple tree start address in do_mprotect

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Message-Id: <20220825180614.0ea05648f898bfa17f95a83c@linux-foundation.org>
Date:   Thu, 25 Aug 2022 18:06:14 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Liam Howlett <liam.howlett@...cle.com>
Cc:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>, Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH] mm/mprotect: Fix maple tree start address in
 do_mprotect_pkey()

On Thu, 25 Aug 2022 20:30:24 +0000 Liam Howlett <liam.howlett@...cle.com> wrote:

> Use the untagged_addr() instead of the address passed into the function.

What are the runtime effects of this fix?